#login-box {
    width: 30%;
    height: 300px;
    border: 1px solid #000000;
    margin: 0 auto;
    margin-top: 15%;
    text-align: center;
    background: #000000;
    padding: 20px 50px;
}
#login-box .form {
    margin-top: 50px;
}
#login-box .form.item{
    margin-top: 15px;
}
#login-box .form.item input {
    width: 180px;
    font-size: 18px;    
    border: 0;
    border-bottom: 2px solid #ffffff;
    padding: 5px 10px;
    background: #ffffff00;
    color: #fff;
}
#login-box button{
    margin-top: 15px;
    width: 180px;
    height: 30px;
}